AirHint found the following cheapest return flights from Mexico City (MEX) to Buenos Aires (EZE) in September 2025 (see full year).

Return flights

21 Sep - 28 Sep	Arajet
23 Sep - 28 Sep	Arajet
12 Sep - 01 Oct	Arajet
03 Sep - 10 Sep	Arajet
04 Sep - 16 Sep	Avianca
25 Sep - 30 Sep	Avianca
09 Sep - 16 Sep	Avianca
12 Sep - 19 Sep	Arajet
12 Sep - 20 Sep	Arajet
12 Sep - 22 Sep	Arajet
15 Sep - 19 Sep	LATAM Airlines Group
18 Sep - 05 Oct	Arajet
23 Sep - 24 Oct	LATAM Airlines Group
24 Sep - 09 Oct	LATAM Airlines Group
27 Sep - 12 Oct	LATAM Airlines Group
15 Sep - 02 Oct	LATAM Airlines Group
21 Sep - 16 Oct	LATAM Airlines Group
02 Sep - 02 Oct	Copa
22 Sep - 09 Oct	LATAM Airlines Group
28 Sep - 13 Oct	LATAM Airlines Group

Also check the deals for one-way flights from Mexico City to Buenos Aires in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from Mexico City to Buenos Aires in September from $619

Return flights